38 STERNOXI — ELATERIDAE. 



Head and elytra black. L. 3|- 1. Very rare. 



C. thoracicus, Fab. 



jB. Thorax red, base and front third part black. 



Head and elytra black. L. 2| 1. Very rare, 



C. ruficollis, Lin. 

 C. Thorax entirely black. 



Gray-black, with close grayish pubescence. L. 3| — 4 1. 

 Not very common. G. asellus, Er. 



Melanotus, 



A, Sciitellum as broad as long. 



Black. Thorax strongly and very closely punctured all 

 over, with a raised central line. L. 5| — 6| 1. Not com- 

 mon. 3£. punctolineatus,Tel. 



JB. Scutellum much longer than broad. 



a* Sides of thorax scarcely rounded. 



Pitch-black or pitch-brown. Thorax punctured rather 

 closely at sides, more diffusely in middle ; elytra 3| times 

 as long as thorax. Antennae of male with long hairs. L. 

 6| — 9 lines. Eare. M. castanipes, Payk. 



&. Sides of thorax evenly rounded. 



Similar to M. castanipes, but with elytra only three times 

 as long as thorax and punctuation feebler. L. 5 — 8 1. 

 Common. M. rufipes, Herbst. 



Limofiius. 



A, Interstices of punctures on thorax not larger than punc- 

 tures themselves. 



Black, with some bronze reflection ; hairs gray. Sternal 

 spine furrowed. L. 4 — 5 1. Rather common. 



L. cylindricus, Payk. 



J5. Interstices of punctures on thorax much larger than 

 punctures themselves. 



ci. Tarsal claws somewhat dilated until near middle, 

 then suddenly narrowed. 



Black, with very little, if any, bronze reflection ; tibiae 

 and tarsi dark brown ; pubescence scanty, gray. Thorax 



